单项选择题
A．how much cost them B．who do they cost C．they cost how much D．what they cost
（）we have finished the book, we shall start doing some ...
单项选择题（）we have finished the book, we shall start doing some exercises.
A．For now B．Since that C．Now that D．Since already
I can not help（）the box for you, as I am too tired. A．c...
单项选择题I can not help（）the box for you, as I am too tired.
A．carrying B．carry C．with carrying D．being carried
It was not（）she took off her dark glasses（）I realized s...
单项选择题It was not（）she took off her dark glasses（）I realized she was a famous film star.
A．when, that B．until, that C．until, when D．when, then
